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43 Results Found

  • Article
  • Open Access
2 Citations
2,314 Views
21 Pages

2 February 2024

Full tensor of gravity gradients contains extremely large amounts of information, which is one of the most important sources for research on recovery seafloor topography and underwater matching navigation. The calculation and accuracy of the full ten...

  • Article
  • Open Access
18 Citations
6,829 Views
21 Pages

17 June 2015

The hydrodynamics of low-lying riverine floodplains and wetlands play a critical role in hydrology and ecosystem processes. Because small topographic features affect floodplain storage and flow velocity, a hydrodynamic model setup of these regions im...

  • Article
  • Open Access
51 Citations
6,621 Views
21 Pages

Impact of Surface Waves on SWOT’s Projected Ocean Accuracy

  • Eva Peral,
  • Ernesto Rodríguez and
  • Daniel Esteban-Fernández

4 November 2015

The Surface Water and Ocean Topography (SWOT) mission being considered by NASA has, as one of its main objectives, to measure ocean topography with centimeter scale accuracy over kilometer scale spatial resolution. This paper investigates the impact...

  • Article
  • Open Access
28 Citations
4,068 Views
42 Pages

Data-Driven Calibration Algorithm and Pre-Launch Performance Simulations for the SWOT Mission

  • Gérald Dibarboure,
  • Clément Ubelmann,
  • Benjamin Flamant,
  • Frédéric Briol,
  • Eva Peral,
  • Geoffroy Bracher,
  • Oscar Vergara,
  • Yannice Faugère,
  • François Soulat and
  • Nicolas Picot

30 November 2022

The Surface Water and Ocean Topography (SWOT) mission will be affected by various sources of systematic errors, which are correlated in space and in time. Their amplitude before calibration might be as large as tens of centimeters, i.e., able to domi...

  • Article
  • Open Access
1 Citations
1,858 Views
25 Pages

Coastal Eddy Detection in the Balearic Sea: SWOT Capabilities

  • Laura Fortunato,
  • Laura Gómez-Navarro,
  • Vincent Combes,
  • Yuri Cotroneo,
  • Giuseppe Aulicino and
  • Ananda Pascual

23 July 2025

Mesoscale coastal eddies are key components of ocean circulation, mediating the transport of heat, nutrients, and marine debris. The Surface Water and Ocean Topography (SWOT) mission provides high-resolution sea surface height data, offering a novel...

  • Technical Note
  • Open Access
1,671 Views
16 Pages

4 April 2025

The Baltic Sea is an intra-continental marginal sea that is vertically stratified with a strong halocline isolating the saline bottom layer from the brackish surface layer. The surface layer is eutrophic, and abiotic zones lacking oxygen are common i...

  • Article
  • Open Access
1 Citations
1,258 Views
16 Pages

Block-Circulant Approximation of the Precision Matrix for Assimilating SWOT Altimetry Data

  • Max Yaremchuk,
  • Christopher Beattie,
  • Gleb Panteleev and
  • Joseph D’Addezio

29 May 2024

The recently deployed Surface Water and Ocean Topography (SWOT) mission for the first time has observed the ocean surface at a spatial resolution of 1 km, thus giving an opportunity to directly monitor submesoscale sea surface height (SSH) variations...

  • Article
  • Open Access
2 Citations
2,514 Views
21 Pages

Analytical Models for Multipath and Switch Leakage for the SWOT Interferometer

  • Razi Ahmed,
  • Daniel Esteban-Fernández and
  • Scott Hensley

1 March 2022

The Ka-Band Radar Interferometer (KaRIn) instrument on the Surface Water and Ocean Topography (SWOT) mission is a single-pass synthetic aperture radar (SAR) interferometer tasked with, among others, measuring ocean topography to within a few centimet...

  • Article
  • Open Access
30 Citations
4,330 Views
24 Pages

KaRIn Noise Reduction Using a Convolutional Neural Network for the SWOT Ocean Products

  • Anaëlle Tréboutte,
  • Elisa Carli,
  • Maxime Ballarotta,
  • Benjamin Carpentier,
  • Yannice Faugère and
  • Gérald Dibarboure

20 April 2023

The SWOT (Surface Water Ocean Topography) mission will provide high-resolution and two-dimensional measurements of sea surface height (SSH). However, despite its unprecedented precision, SWOT’s Ka-band Radar Interferometer (KaRIn) still exhibit...

  • Article
  • Open Access
26 Citations
7,666 Views
39 Pages

27 May 2014

The proposed surface water and ocean topography (SWOT) mission aims at observing short scale ocean topography with an unprecedented resolution and accuracy. Its main proposed sensor is a radar interferometer, so a major source of topography error is...

  • Article
  • Open Access
21 Citations
4,294 Views
23 Pages

An Investigation of the Influences of SWOT Sampling and Errors on Ocean Eddy Observation

  • Chunyong Ma,
  • Xiaoxiao Guo,
  • Haoxin Zhang,
  • Jiankai Di and
  • Ge Chen

19 August 2020

The mission of Surface Water and Ocean Topography (SWOT) is scheduled to be launched in 2022, and global ocean eddies with radius scales of larger than 10 km are expected to be observed from space. However, there are still open questions about the ca...

  • Article
  • Open Access
21 Citations
4,211 Views
21 Pages

Reduction of Spatially Structured Errors in Wide-Swath Altimetric Satellite Data Using Data Assimilation

  • Sammy Metref,
  • Emmanuel Cosme,
  • Julien Le Sommer,
  • Nora Poel,
  • Jean-Michel Brankart,
  • Jacques Verron and
  • Laura Gómez Navarro

3 June 2019

The Surface Water and Ocean Topography (SWOT) mission is a next generation satellite mission expected to provide a 2 km-resolution observation of the sea surface height (SSH) on a two-dimensional swath. Processing SWOT data will be challenging becaus...

  • Article
  • Open Access
871 Views
18 Pages

3 August 2025

The Surface Water and Ocean Topography (SWOT) mission provides unprecedented high-resolution observations of sea-surface height. However, their direct use in ocean circulation studies is complicated by the presence of small-scale unbalanced motion si...

  • Feature Paper
  • Article
  • Open Access
25 Citations
10,463 Views
22 Pages

Estimating River Depth from SWOT-Type Observables Obtained by Satellite Altimetry and Imagery

  • Mohammad J. Tourian,
  • Omid Elmi,
  • Abolfazl Mohammadnejad and
  • Nico Sneeuw

30 September 2017

The proposed Surface Water and Ocean Topography (SWOT) mission aims to improve spaceborne estimates of river discharge through its measurements of water surface elevation, river width and slope. SWOT, however, will not observe baseflow depth, which l...

  • Article
  • Open Access
8 Citations
4,387 Views
19 Pages

28 May 2019

Utilizing a high-resolution (2-km) coastal ocean model output off Eastern Newfoundland, this paper explores the potential for reconstructing the sea surface height (SSH) and the surface inshore Labrador Current from high-resolution SSH data of the up...

  • Communication
  • Open Access
14 Citations
7,278 Views
12 Pages

31 March 2024

The Surface Water and Ocean Topography (SWOT) mission, launched in December 2022, aims to address the crucial environmental goal of water monitoring to support preparedness for extreme events and facilitate adaptation to climate change on global and...

  • Article
  • Open Access
1 Citations
2,103 Views
20 Pages

SWOT-Based Intertidal Digital Elevation Model Extraction and Spatiotemporal Variation Assessment

  • Hongkai Shi,
  • Dongzhen Jia,
  • Xiufeng He,
  • Ole Baltazar Andersen and
  • Xiangtian Zheng

24 April 2025

Traditional methods for the construction of intertidal digital elevation models (DEMs) require the integration of long-term multi-sensor datasets and struggle to capture the spatiotemporal variation caused by ocean dynamics. The SWOT (surface water a...

  • Article
  • Open Access
1,899 Views
29 Pages

Description and In-Flight Assessment of the POSEIDON-3C Altimeter of the SWOT Mission

  • Alexandre Guérin,
  • Fanny Piras,
  • Nicolas Cuvillon,
  • Alexandre Homerin,
  • Sophie Le Gac,
  • Claire Maraldi,
  • François Bignalet-Cazalet,
  • Marta Alves and
  • Laurent Rey

9 November 2024

The Surface Water and Ocean Topography (SWOT) mission was launched on 16 December 2022 to measure water levels over both open ocean and inland waters. To achieve these objectives, the SWOT Payload contains an innovative Ka-band radar interferometer,...

  • Article
  • Open Access
20 Citations
5,315 Views
26 Pages

Mapping Water Surface Elevation and Slope in the Mississippi River Delta Using the AirSWOT Ka-Band Interferometric Synthetic Aperture Radar

  • Michael Denbina,
  • Marc Simard,
  • Ernesto Rodriguez,
  • Xiaoqing Wu,
  • Albert Chen and
  • Tamlin Pavelsky

21 November 2019

AirSWOT is an airborne Ka-band synthetic aperture radar, capable of mapping water surface elevation (WSE) and water surface slope (WSS) using single-pass interferometry. AirSWOT was designed as a calibration and validation instrument for the forthcom...

  • Communication
  • Open Access
3 Citations
1,641 Views
11 Pages

13 June 2022

The upcoming technology of wide-swath altimetry from space will deliver a large volume of data on the ocean surface at unprecedentedly high spatial resolution. These data are contaminated by errors caused by the uncertainties in the geometry and orie...

  • Article
  • Open Access
7 Citations
4,415 Views
18 Pages

Characterization of SWOT Water Level Errors on Seine Reservoirs and La Bassée Gravel Pits: Impacts on Water Surface Energy Budget Modeling

  • Catherine Ottlé,
  • Anthony Bernus,
  • Thomas Verbeke,
  • Karine Pétrus,
  • Zun Yin,
  • Sylvain Biancamaria,
  • Anne Jost,
  • Damien Desroches,
  • Claire Pottier and
  • Agnès Rivière
  • + 3 authors

8 September 2020

The Surface Water and Ocean Topography (SWOT) space mission will map surface area and water level changes in lakes at the global scale. Such new data are of great interest to better understand and model lake dynamics as well as to improve water manag...

  • Article
  • Open Access
13 Citations
4,030 Views
20 Pages

6 October 2020

The Surface Water and Ocean Topography (SWOT) satellite mission, expected to launch in 2022, will enable near global river discharge estimation from surface water extents and elevations. However, SWOT’s orbit specifications provide non-uniform...

  • Article
  • Open Access
1,282 Views
14 Pages

Surface water is the primary freshwater supply for Earth. Small lakes and ponds provide important ecological and economic services to society but are often left undocumented, or their documentation is outdated, due to their small sizes and temporal d...

  • Article
  • Open Access
8 Citations
3,147 Views
15 Pages

30 June 2023

While many studies have been conducted regarding wind-driven Ka-band scattering on the ocean and sea surfaces, few have identified the impacts of Ka-band scattering on small inland water bodies, and fewer have identified the influence of wind on cohe...

  • Article
  • Open Access
24 Citations
5,113 Views
23 Pages

Development of an Image De-Noising Method in Preparation for the Surface Water and Ocean Topography Satellite Mission

  • Laura Gómez-Navarro,
  • Emmanuel Cosme,
  • Julien Le Sommer,
  • Nicolas Papadakis and
  • Ananda Pascual

22 February 2020

In the near future, the Surface Water Ocean Topography (SWOT) mission will provide images of altimetric data at kilometric resolution. This unprecedented 2-dimensional data structure will allow the estimation of geostrophy-related quantities that are...

  • Article
  • Open Access
3 Citations
1,622 Views
22 Pages

Potential Legacy of SWOT Mission for the Estimation of Flow–Duration Curves

  • Alessio Domeneghetti,
  • Serena Ceola,
  • Alessio Pugliese,
  • Simone Persiano,
  • Irene Palazzoli,
  • Attilio Castellarin,
  • Alberto Marinelli and
  • Armando Brath

17 July 2024

Flow–duration curves (FDCs) provide a compact view of the historical variability of river flows, reflecting climate conditions and the main hydrologic features of river basins. The Surface Water and Ocean Topography (SWOT) satellite mission wil...

  • Article
  • Open Access
7 Citations
5,604 Views
24 Pages

Assimilation of Synthetic SWOT River Depths in a Regional Hydrometeorological Model

  • Vincent Häfliger,
  • Eric Martin,
  • Aaron Boone,
  • Sophie Ricci and
  • Sylvain Biancamaria

4 January 2019

The SWOT (Surface Water and Ocean Topography) mission, to be launched in 2021, will provide water surface elevations, slopes, and river width measurements for rivers wider than 100 m. In this study, synthetic SWOT data are assimilated in a regional h...

  • Article
  • Open Access
5 Citations
5,001 Views
20 Pages

20 March 2023

River discharge monitoring is an important component of the hydrology objectives of Surface Water and Ocean Topography mission (SWOT). River discharge can be estimated Solely using river widths and At Many-stations Hydraulic Geometry (AMHG), but the...

  • Article
  • Open Access
190 Views
21 Pages

23 January 2026

Wide-swath satellite altimetry from the Surface Water and Ocean Topography (SWOT) mission provides an unprecedented opportunity to directly observe kilometer-scale ocean dynamics in two dimensions. In this study, we identify an atypical bimodal seaso...

  • Article
  • Open Access
1 Citations
2,897 Views
63 Pages

11 February 2025

Recent advancements in satellite Earth observation (EO) technology have significantly improved the accuracy and density of data available for monitoring rivers and streams, as well as for diagnosing errors in hydraulic models. Laser and radar altimet...

  • Article
  • Open Access
4 Citations
4,137 Views
23 Pages

20 April 2021

The upcoming Surface Water and Ocean Topography (SWOT) mission will measure rivers wider than 50–100 m using a 21-day orbit, providing river reach derived discharges that can inform applications like flood forecasting and large-scale hydrologic model...

  • Review
  • Open Access
55 Citations
10,306 Views
35 Pages

18 October 2021

Surface water storage (SWS), the amount of freshwater stored in rivers/wetlands/floodplains/lakes, and its variations are key components of the water cycle and land surface hydrology, with strong feedback and linkages with climate variability. They a...

  • Article
  • Open Access
23 Citations
4,873 Views
19 Pages

12 October 2020

Remote sensing data are essential for monitoring the Earth’s surface waters, especially since the amount of publicly available in-situ data is declining. Satellite altimetry provides valuable information on the water levels and variations of la...

  • Feature Paper
  • Article
  • Open Access
15 Citations
7,219 Views
23 Pages

Flow Duration Curve from Satellite: Potential of a Lifetime SWOT Mission

  • Alessio Domeneghetti,
  • Angelica Tarpanelli,
  • Luca Grimaldi,
  • Armando Brath and
  • Guy Schumann

11 July 2018

A flow duration curve (FDC) provides a comprehensive description of the hydrological regime of a catchment and its knowledge is fundamental for many water-related applications (e.g., water management and supply, human and irrigation purposes, etc.)....

  • Article
  • Open Access
503 Views
29 Pages

Noise Reduction for the Future ODYSEA Mission: A UNet Approach to Enhance Ocean Current Measurements

  • Anaëlle Tréboutte,
  • Cécile Anadon,
  • Marie-Isabelle Pujol,
  • Renaud Binet,
  • Gérald Dibarboure,
  • Clément Ubelmann and
  • Lucile Gaultier

31 October 2025

The ODYSEA (Ocean DYnamics and Surface Exchange with the Atmosphere) mission will provide simultaneous two-dimensional measurements of currents and winds for the first time. According to the ODYSEA radar concept, with a high incidence angle, current...

  • Article
  • Open Access
36 Citations
8,915 Views
31 Pages

19 March 2015

Synthetic Aperture Radar (SAR) has been successfully used to map wetland’s inundation extents and types of vegetation based on the fact that the SAR backscatter signal from the wetland is mainly controlled by the wetland vegetation type and water lev...

  • Article
  • Open Access
267 Views
22 Pages

29 January 2026

Mesoscale eddies play a key role in oceanic transport, yet their characterization in marginal seas like the Gulf of California remains challenging due to complex coastlines and bathymetry that hinder conventional detection methods. This study address...

  • Article
  • Open Access
22 Citations
5,117 Views
21 Pages

GNSS/INS-Equipped Buoys for Altimetry Validation: Lessons Learnt and New Directions from the Bass Strait Validation Facility

  • Boye Zhou,
  • Christopher Watson,
  • Benoit Legresy,
  • Matt A. King,
  • Jack Beardsley and
  • Alistair Deane

15 September 2020

Global Navigation Satellite System (GNSS)-equipped buoys have a fundamental role in the validation of satellite altimetry. Requirements to validate next generation altimeter missions are demanding and call for a greater understanding of the systemati...

  • Feature Paper
  • Article
  • Open Access
24 Citations
3,840 Views
29 Pages

Intercomparison of Data-Driven and Learning-Based Interpolations of Along-Track Nadir and Wide-Swath SWOT Altimetry Observations

  • Maxime Beauchamp,
  • Ronan Fablet,
  • Clément Ubelmann,
  • Maxime Ballarotta and
  • Bertrand Chapron

20 November 2020

Over the last few years, a very active field of research has aimed at exploring new data-driven and learning-based methodologies to propose computationally efficient strategies able to benefit from the large amount of observational remote sensing and...

  • Article
  • Open Access
1 Citations
2,572 Views
34 Pages

Analysis of High-Frequency Sea-State Variability Using SWOT Nadir Measurements and Application to Altimeter Sea State Bias Modelling

  • Estelle Mazaleyrat,
  • Ngan Tran,
  • Laïba Amarouche,
  • Douglas Vandemark,
  • Hui Feng,
  • Gérald Dibarboure and
  • François Bignalet-Cazalet

22 November 2024

The 1-day fast-sampling orbit phase of the Surface Water Ocean Topography (SWOT) satellite mission provides a unique opportunity to analyze high-frequency sea-state variability and its implications for altimeter sea state bias (SSB) model development...

  • Article
  • Open Access
6 Citations
5,274 Views
18 Pages

8 April 2025

The Surface Water and Ocean Topography (SWOT) satellite mission, jointly developed by NASA and several international collaboration agencies, aims to achieve high-resolution two-dimensional observations of global surface water. Equipped with the advan...

  • Article
  • Open Access
2 Citations
1,722 Views
22 Pages

5 June 2025

The Global Navigation Satellite System (GNSS), Internet of Things (IoT) and cloud computing technologies enable high-precision positioning with flexible data communication, making real-time/near-real-time monitoring more economical and efficient. In...

  • Article
  • Open Access
18 Citations
5,302 Views
22 Pages

19 April 2019

Water resource management has faced challenges in recent decades due to limited in situ observations and the limitations of hydrodynamic modeling. Data assimilation techniques have been proposed to improve hydrodynamic model outputs of local rivers (...